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package org.apache.juneau.http;

import org.apache.juneau.internal.*;

/**
 * Category of headers that consist of a single HTTP-date.
 * 
 * <p>
 * <h5 class='figure'>Example</h5>
 * <p class='bcode'>
 * 	If-Modified-Since: Sat, 29 Oct 1994 19:43:31 GMT
 * </p>
 * 
 * <h5 class='section'>See Also:</h5>
 * <ul class='doctree'>
 * 	<li class='extlink'><a class='doclink' href='https://www.w3.org/Protocols/rfc2616/rfc2616.html'>Hypertext Transfer Protocol -- HTTP/1.1</a>
 * </ul>
 */
public class HeaderDate {

	private final java.util.Date date;
	private final String raw;

	/**
	 * Constructor.
	 * 
	 * @param raw The raw header value.
	 */
	protected HeaderDate(String raw) {
		this.raw = raw;
		this.date = DateUtils.parseDate(raw);
	}

	/**
	 * Returns this header value as a {@link java.util.Date}.
	 * 
	 * @return This header value as a {@link java.util.Date}, or <jk>null</jk> if the header could not be parsed.
	 */
	public java.util.Date asDate() {
		return date;
	}

	@Override /* Object */
	public String toString() {
		return raw;
	}
}
